Insulated record container



May 2, 1944 E. H. MosLER ETAL 2,347,705

INSULATED RECORD CONTAINER May 2, 1944- E. H. MosLER Erm.

INSULATED RECORD CONTAINER Filed Jan. 5, 1940 2 Sheets-Sheet 2 8 .6. 5muI 2.1 :r@.,

7 f 1mm@ l iz?. 6

7 INVENTORS EDWIN H. MOSLER BY HARRY H. LYNN 4&0 l, ATToR ,.f f

Patented May 2, 1944 INSULATED RECORD CONTAINER Edwin H. Mosler, NewYork, N. Y., and Harry H. Lynn, Wyoming, Ohio, assignors to The MoslerSafe Company, Hamilton, Ohio, a corporation f New York ApplicationJanuary 5,1940, serial No. 312,573

a claims. (c1. s- 59) This invention relates to an insulated recordcabinet or container or safe which is adapted to withstand hightemperatures, crushing forces, and other destructive actions incidentalto accidental fire and like disasters.

An object of the invention is to provide a cabinet of the kind mentionedabove,4 which includes structural advances that render the cabinethighly protective of its contents, under conditions which wouldordinarily melt, distort, mangle or explode other cabinets of the same igeneral type.

Another object of the invention is to provide an improved closure forinsulated record cabinets, which is highly resistant to entry ofdirected water, heat, flame, dirt and dust, and which is furthercharacterized by an outstanding ability to prevent explosion of thecabinet in the presence of extremely high temperatures Another object isto provide a cabinet and closure arrangement that will withstand thecrushing eilect of dropping the cabinet bodily, when closed, lthrough adistance approximating thirty feet, as sometimes occurs in the collapseof a fired building or its flooring.

A further object of the invention is to provide an improved bolt-workfor safes and cabinets, and like depositories.

An object also is the accomplishment of the above objects and advantagesinexpensively, and with the greatest possible degree of efficiency.

The foregoing and other objects are attained by the means describedherein and disclosed in the accompanying drawings, in which:

Flg. 1 is a front elevational view of an insulated record cabinet of theinvention, showing the door I thereof in the normal open, yet concealed,position at one side of the cabinet.

Fig. 2 is a cross-sectional view taken horizontally through the cabinetof Fig. 1, but with the door in the closed and bolted condition Fig. 3is an enlarged fragmental cross-sectional view taken through the cabinetdoor, on lines 3-3 of Fig. 4, the insulating material being removed.

Fig. 4 is a rear elevational view of the iinproved door and bolt-workembodying the present invention.

The cabinet of this invention is so constructed as to perform theservices of an ordinary record ling cabinet having sliding drawersdisposed vertically, but embodying also a reinforced and insulatedconstruction in furtherance of the objects stated above. This improvedconstruction embodies also a disappearing door 1, which may enter anauxiliary vertical compartment 8 at one side of the cabinet, whenopened. The disappearing feature of the door will not receive detailedtreatment in this description, since it is possible to accomplish thatin various ways, an example of which is disclosed in the prior artpatent of Abbott et al. No. 1,873,247, granted August 23, 1932. Unlikethe device of the patent just mentioned, the device of the presentinvention is devoted more to the problem of preserving the contentsthereof, than to that of resisting burglary or forced entry to thecontents. Accordingly, various structural dierences will necessarilyprevail, for distinguishing the devices one from the other.

Referring to sheet l of the accompanying drawings, 9 indicates the top,l0, the bottom, and II and I2, the side Walls, of an outer shellconstituting the cabinet exterior. The cabinet may be placed upon a baseI3, if desired. The top and bottom walls preferably are extended as atI4 and l5, to one side of the cabinet, Where they are joined by anexterior Wall I6 to form the auxiliary compartment 8 that houses thedisappearing door 1 when the door is open, as illus`- trated in Fig. 1.

Within the auxiliary compartment, there may be provided one or morehorizontal tracks li adapted to support a wheeled carriage i8 thatcarries the hinge leaves I9 of the door l An extension 20 of the door,which substantially closes the front of the auxiliary compartmentnormally, carries the other hinge leaf 2|, the leaves being joinedpivotally by means of a hinge pin 22, as will be understood. Uponopening the door of the cabinet, the door may be positioned in.substantial parallelism with the carriage i8, so that the carriage maybe rolled rearwardly upon the track I1 carrying with it the door 1 sothat the door will be housed substantially within the auxiliarycompartment 8 in substantial parallelism with the walls I2 and I6 of thecabinet. The characters 23 indicate rollers on carriage I8, tofacilitate shifting of the carriage as stated. A corner reinforcement 24may be provided for the auxiliary compartment, at both the front and therear thereof, if necessary or desirable. As previously stated herein,the details of the carriage are relatively immaterial to the presentinvention, wherefore a detailed description is deemed unnecessary.

The cabinet proper is lined with an inner shell which is substantiallysmaller than the outer shell, so that suitable insulating material 25may be impacted between the shells to protect the contents of thecabinet from intense heat and flame, when required to meet suchconditions. The inner shell comprises side-walls 2li, a bottom wall 2li,a top wall 25, and a rear wall 29 which extends substantially the fullheight of the cabinet. The inner shell may be constructed of light gaugemetal, however, it is to be reinforced so as to resist possible crushingand serious distortion in the event that the cabinet be dropped asubstantial distance, such as might occur in the event that a floorcollapses or becomes weakened by reason of destruction of other partsor" a building. The reinforcement consists in providing a series ofsheet metal shelves or partitions 3l), each extending from the rear wallof the cabinet inner shell to a location near the front of the cabinet.The forward edge 3i of each shelf preferably is reinforced by turning itat right angles to the body of the shelf, thereby providing flanges suchas 3l. The shelves are securely fixed along their side and rear edges tothe inner shell of the cabinet, preferably by means of welding, so thatthe inner shell with its shelves or partitions, constitutes an integralrigid unit. The characters li of Fig. 2 indicate fusible plugs in thedoor and outer walls, for the release of gases generated along suchwalls when subjected to high temperatures.

In constructing the cabinet interior, it is found desirable to terminatethe forward edges 33 of the inner shell side, top and bottom walls, at alocation remote from the front of the cabinet, and to furnish side, topand bottom door jarnb inserts, indicated at EL3, to complete the forwardportion of the inner shell. These inserts preferably overlap the innershell walls as at 35, and are spot welded thereto at spaced intervals,thereby establishing the desired rigidity. Since the Welds are at spacedintervals, the shell walls and the inserts will not be in intimatecontact except at a few points, wherefore there is established at theoverlap a heat conductivity break or interruption between the exteriorand the interior of the cabinet, for protecting the contents. It will benoted that the jamb inserts are flared outwardly at 35 and thenprojected inwardly as at 3S, to furnish bolt keeper recesses or channels3l for accommodating the door bolts. The channels or recesses arecontinuous about the entry port or doorway of the cabinet. 'Forwardly ofthe channel or recess of each :lamb insert, the metal is projected on aslight angle to provide the sloping or tapered jamb face 38 whichaccommodates the complementary jamb face 39 of the door l. At theextreme forward edge of face 38, the insert is turned upon itself as atd to enter a channel il] of the outer shell. Within the channel 4I,which extends circumferentially of the doorway, the flange d of the jambinsert is welded at intervals to the metal of the jamb, thereby furtherestablishing the desirable rigid and integral nature of the cabinetparts.

At this point in the description, attention may be directed to the factthat the various compartments formedbetween the shelves 30 and the topand bottom walls of the inner shell, are adapted to receive filingdrawers-or other containers to which access may be desired when thecabinet door i's opened. Such drawers or containers have been omittedfrom the drawing disclosures in the interest of clarity, and for thefurther reason that the cabinet need not necessarily be provided withsuch fixtures.4 y

In furtherance o f some of the objects of this invention, the door. oftheA cabinet iS of Special acer/,ree

design, and comprises a rather substantial front plate or panel di?, ofwhich the side extension 2@ preferably is an integral part. Along thetop, bottom, and one side edge thereof, the door may be flanged as at33, these flanges being adapted for reception in the continuous channellll which bounds or defines the doorway of the cabinet. Another flangefor the same purpose, may be provided on a separate upright plate iiiwhich is Welded or otherwise permanently fixed to the in= ner face ofpanel d2, the separate plate being used also as a reinforcement wherethe hinge leaf 2l is fixed to the door. Plate @l5 may be flanged alsoatlit, to strengthen the door structure and to also act as a stoplimiting the movement of the door about its hinge connection to thecarriage I8.

As clearly illustrated in Fig. 2, a suitable recess lll may be providedin the front plate of the door, for the reception of a manipulatingmeans for the bolts of the door, which manipulating means is in thepresent embodiment constituted of a handle it pivoted as at i9 upon acrosspiece 5D of the bolt-actuating shaft or spindle 5|. The purposeofproviding the recess, and of pivotally mounting the handle at 15S, isto enable the handle to be displaced to a position flush with the frontof the door when vthe handle is not in use, thereby to eliminatepossible interference with disposing the door to the inoperative andsubstantially concealed position illustrated .in Fig. 1.

The character 32 indicates any acceptable type of lock for the boltwork.

Within the limits of the space defined by flange Alti, and the upper,lower, and edge flanges 33, the inner face of the door front or plateft2 supports the securing ciianges 52 of the metallic strips 53 thatfurnish the door jamb areas 35. These strips extend along the top,bottom, and side edges of the door proper, within the limits establishedby the four flanges indicated at it and M', and may be formed either inseparate horizontal and vertical sections, or integrally. as a singlestrip. Fixation of the strips through theagency of their respectiveflanges 52, to the inner face of the door panel d2, may be by way ofwelding or otherwise, as desired.

The free edge 5d of each strip 53 is turned inwardly toward the centerof the door, at a distance from the front panel @2, providing a. compartment 55 behind the" major portion of ,the

, door panel, which compaitment is adapted to be packed with'insulatingmaterial 5S of any acceptable kind. The flanges function also as theprimary supporting means for the bolt-work with which the door isequipped. In the form of the invention illustrated, the two uprightflanges 53 of the door are spanned at intervals -by a series ofsubstantial plate-like struts indicated by the characters 5l, 58, and59, the opposite endsv of which struts are welded orotherwisepermanently attached to the said upright flanges 56. In addition tosupporting the bon-work and refinforcing the door structure, theplate-like struts serve also to hold the insulating material 55 inposition within the internal structure of the door.

The inner finish panel or sheet 60 may aid also the functions mentioned,in addition to imparting a iinished appearance to the inside of thedoor. This element 60 has been removed from the Fig. 4 illustration andis shown by means of broken lines inFig. 3 in order to most clearlyexpose the bolt-work and the back of the door. f-

'I'he door bolts hereindisclosed arenot Iof the customary variety, butare formed from elongated steel plates following somewhat the teachingdisclosed in the patent of W. Corliss, No. 447,- 488, dated March 3,1891. In a very general way the Corliss patent discloses the type ofbolt plates employed herein. The bolt plates herein are identified bythe reference characters 6| and 62 for the vertical bolt plates, and bythe characters 83 and 64 for the horizontal bolt plates. I'he severalbolt-| plates are arranged for sliding movement to extended andretracted positions, all of them moving outwardly or inwardly in unisonwhen the primary link shifter 65 is rotated by means of the handle I8located exteriorly of the door. 'I'he opposite ends of each bolt plateare mitered, as indicated generally at 66, preferably at an angleapproximating 45. When the bolt plates are fully retracted, asillustrated in Fig. 4, the mitered ends thereof abut, or preferably so.

The three door bolts indicated at 6l, 62, and 53 may be mounted forshiftability relative to the inturned flanges I of the strips 53 in anyacceptable manner, such as by providing them with elongated slots 61through which extend the studs 68 which are anchored to the severalflanges 54. Such studs are most clearly illustrated in Fig. -3, and'areseen to include a thread end 69, the threads of which engage theinternally threaded bore 10 of a reinforcing metallic bar 1i which backsthe circumferential flange assembly 5I. In other words, reinforcing barssuch as 1l function as thread nuts into which the screw thread ends ofthe various bolt plate mounting studs may engage, for anchoring thestuds to the door. The characters 12 and 13 indicate, respectively, aspacing washer and a screw adapted for mounting the finish panel orsheet 60 upon the rear of the door. As shown in Fig. 3, the screw 13 mayenter a central threaded bore 14 of the mounting stud 68. All of themounting studs may be utilized in this manner to support the finishpanel, if desired.

Attention is now directed to the means shown in Fig. 4 for shifting thebolt plates upon rotation of the handle 48 and its spindle 5i. Theprimary link shifter 65 conveniently may be formed from a at platecentrally mounted in iixed relationship to the operating spindlel. Theend of the spindle that supports the plate may be squared or providedwith one or more flats, so that the plate may not rotate relative to thespindle. Pivots 15 on the plate or shifter 55, serve to mount the innerends 16 and 11 of a pair of T-links 18 and 19 at opposite sides of thespindle 5 I, whereby rotation of the spindle and its associated shifterplate will result in longitudinal reciprocation of the T-links inunison. The head-bar 80 of T-link 18 has its opposite ends perforated asat 8| and 82 for the reception of the turned lugs 83 on each of thesecondary shifters 84 and 85. By this means, the vertical shifting ofT-link 18 results in rotational movement of the secondary shifters abouttheir respective pivots 86. At the locations 81 and 88 of each of saidsecondary Shifters, a connection similar to 8I--83 is provided, forshifting longitudinally the pairs of links 89-89 and Sii-90. The links89 serve to elevate and lower the upper horizontal bolt plate E3 whenthe bolt-work is actuated, and in like inanner the pair of links "-90operate upon the vertical bolt plates 6l and 62 for shifting them bodilyto extended and retracted positions simultaneously with movement of thebolt plate 83.

At the lower portion of Fig. 4, the head-bar 9i acts in precisely themanner above referred to. to rotate the secondary Shifters 82 and 83 forreciprocating the pairs of links 94-94 and $5- 95. By means of theselink pairs, the lower ends of the bolt plates Si and 62, and the lowerhorizontal bolt plate 84, are adapted t0 be moved in unison with thebolt structures at the upper end of Fig. 4.

From all of the foregoing, it will be understood by reference to Fig. 2,that rotation of the main spindle 5l by means of handle 48, will resultin extending all of the bolt plates to the outward limit of travel sothat each bolt plate will engage its cooperative channel or groove 31,and since the channels or grooves are joined at their ends to form acontinuous recess within the doorway of the cabinet, a rather effectiveseal will be established when the door is closed and bolted. 'Ihis sealin combination with an insulated door and an insulated cabinet, is mostdesirable and constitutes an advance in cabinet structures of theinsulated type. The reason for this is that any insulating material whensubjected to high temperatures will liberate gases, thereby generatinghigh pressures within the cabinet capable of bursting the cabinet ifconfined too securely, or of igniting and possibly damaging the contentsof the cabinet if the gases are liberated too freely from the cabinetinterior. By this is meant, that the metal of the cabinet or itsclosure, when subjected to high temperatures, will promote theliberation of hydrogen gas from the insulating material, and since thisgas is of a combustible nature it should be liberated from the cabinetas a slight seepage, rather than freely, in order to minimize thepossibility of ignition and explosion within the connes of the cabinet.The type of seal effected by the bolting means of this inventionsafeguards the cabinet against the hazards mentioned. The insulatingmaterial within the door and between the inner and outer shells of thecabinet serves to effectively protect the contents of the cabinet fromdamage by lire or extreme heat to which the device may be subjectedduring a conlagration. The door bolting means, being semi-tight to theextent necessary for precluding ignition and explosion of liberatedgases within the cabinet, is nevertheless sufliciently tight to preventrected water and other foreign substances from entering the cabinetunder the adverse conditions accompanying and incidental to aconagration.

It sometimes occurs that a floor or other support upon which the cabinetis standing, will collapse and allow the cabinet to plunge for adistance approximating the height of a building story, and under suchcircumstances it may generally be expected that the cabinet will landwith its bottom foremost upon the fioo'r below. The impact resultingfrom such a plunge will ordinarily be directed against the lowerhorizontal bolt plate 64, and if the force is sulficient to move thatparticular bolt plate to the retracted position, the remaining boltplates would be actuated through the links 95 and all of the otherlinks, to similarly retract each of the bolt plates, thereby leaving thedoor free to swing open and expose the contents of the cabinet todestruction. To guard against this possibility, the lower horizontalbolt plate 64 is provided with a special type of connection with thebolt-work link structure.

With reference to Fig. 3 and the lower half of Fig. 4, it will be notedthat links 95 have their upper ends 81 pivoted at 98 upon the turnedlugs oi the secondary bolt shifter-s d2 and de, whereas the lower endsof said links have their studs @El received in the elongated slots d@ ofthe bolt plate 6d. Accordingly, it might be expected that by restrainingthe bolt plate @il against downward shiftability, the bolt-work could beactuated to move the links de downwardly without moving the bolt plate,the studs @El traveling freely in the slots ed. But such action does notnormally occur, due to the interpositlon or springs ilii, each of whichhas an upper end lidi abutting a link do or an extension to2 thereofwhile the opposite end tot oi the spring bears upon, or is fixed to, thebolt plate dfi. From this it will be understood that downward movementor the links 95 is transferred to the bolt plate through the springstot, so that under normal condi-u tions the bolt plate will move withthe links, without any perceptible movement dlnerential. However, in theevent that a sharp blow is applied upwardly against the bolt plate iidwhile the bolt is extended, the springs it@ will absorb the shock of theblow before the force thereof may be transmitted to the links @d toundesirably actuate the entire bolt-work assembly. The relationship ofthe spring to the link and the bolt plate, is very clearly illustratedby Fig. 3. As shown therein, the lower end it oi the spring is anchoredin an aperture ldd provided in a shoulder ltd that extends the 'fulllength of the bolt plate til. Like all or" the other bolt plates,

the lower bolt plate @t is guided in its upward and downward movementsbyomeans of the stud and slot arrangement indicated at l-til Areinforcing bar 'll together with flange 55 furnishes the necessarymounting means for the studs 68 which enter the elongated slot @l forguiding the horizontal bolt plate d@ in its movement toward and from theextended and retracted positions.

From the foregoing it should be understood that-the cabinet of thisinvention when subjected to a sharp impact from below, at any time thatthe bolts are extended as in Fig. 2, will be safeguarded againstaccidental retraction of all its boit plates, by reason of the resilientconnection between the bolt plate dfi and its associated linkage. Theintervention of springs ldd under normal circumstances doesnot'interfere with the extension and retraction of bolt plate ditsimultaneously with the remaining bolt plates. The safety linkagebecomes operative only in the emergency heretofore mentioned. It may benoted that the links other than those at o5, have regulation pivotalconnections E05 with their respective bolt plates, no lost-motionconnection being there required; however, the bolt-work obviously wouldoperate satisfactorily if two or more of the bolt plates were equippedwith resilient lost-motion connections illustrated and explained withreference to bolt plate Sd.

Referring now to the extreme left ends f the horizontal bolt plates 53and Gli, it will be noted that their outer edges |01 and B138,respectively, are provided with rather long inclines or tapers beginningat the points A and extending to the miter of each bolt plate end.'I'hese tapers or inclines it will be noted, are located adjacent to thehinge region of the door, and their function is to perform as cams toengage the forward portion of the upper and lower jamb areas of thedoorway for automatically retracting all of the doon bolts, in the eventthat the door inadvertently is moved toward the closed position with thebolts extended. .As will be understood, 7d

serious damage might result from an attempt to close the door while thebolts are extended, unless some means were provided for automati callyretracting the bolts. With reference to Fig. i, it may be observed thatthe inclines or cam surfaces itil and ltd will engage the doorway .ofthe cabinet at approximately the loca tions B and C, respectively,should the bolts be extended while the door is moved toward the closedposition, whereupon a cg action will occur causing the upper and lowerbolt plates to be forced inwardlyI to their retracted positions. IThevertical bolt plates, of course, will likewise retract clue to theirconnection with the bolt-work, as the latter will necessarily be actuated automatically upon forceful retraction of bolt plate S3, forexample. Under the clrcum= stances referred to, it will not be necessaryfor -anyone to manipulate the handle de.

A cabinet structure of the character herein illustrated and describedpossesses many advantages not heretofore embodied in devices presentlyknown and used. The improved structure is not unduly heavy, and it maytherefore be moved about in much the same manner as an ordinary orcommonly known le cabinet; yet it furnishes a high degree of protectionagainst internal explosion or destruction of its contents in the eventof fire, water and building collapse. The constituents of the improvedcabinet are simple and inexpensive, and are not likely to become out oforder, so that maintenance costs are low and any necessary repairs maybe accomplished inexpensively without returning the cabinet to thefactory or other service station. The automatic safety features withwhich the device is equipped enables it to withstand abuses which wouldin other cabinet structures result in springing the hinges, the door, or`the cabinet proper, or otherwise iniicting serious damage upon theassembly.

As herelnbefore stated, injury to the cabinet by possible explosion, ordestruction of the contents by accidental release of the door boltsresulting from impact, are eectively reduced to a practical minimum inthe improved structure of this invention. It is of importance to notethat the peripheral closure formed by the four door anges i3 and ldserves, in the closed position of the door, to lock the door and thecabinet body tolgether so as to add structural strength to thecombination for opposing any forces tending to crush or distort it. Thelong side walls of the cabinet are thereby reinforced against bulging'or buckling during a drop, or upon exposureto iire or heat. The flangelock between the door and cabinet also has the effect of obstructingaccess of atmospheric oxygen to the jamb space along the door edges inthe event that the jamb space becomes filled with combustible gases fromthe cabinet interior. Accordingly, any combustible gases liberated from,the jamb space will have' an opportunity to reach the cabinet exterioralong the outer edges of the door, where `combustion thereof will beharmless and reduced in force because the gas will there be unconned.I'heelongated door bolts, being along the extreme inner edges of thedoor, perform as ilame arresters against any small explosions that mightpossibly backfire into the j amb spaces, although this possibility isreduced to a practical minimum bythe nanges i3-ld. The elongated doorbolts and the flanges J3-dd, therefore, will be seen to inject anunusually high factor of safety, as coordinated herein, protective ofthe. cabinet contents toan extentheretofore unattained. Other advantagesand objects of more or less importance are mentioned in other passagesof this description.

It is to be understood that various modifications and changes in thestructural details of the device may be made, within the scope of theappended claims, without departing from the spirit of the invention.

What is claimed is:

l. Boltwork for a door having a front panel of rectan'gular formationhaving a hinge edge, and a rectangular jamb frame on one face of the'panel comprising flanges parallel to the edges of the panel andprojected inwardly toward the middle point of the panel, said boltworkcomprising a series of elongated horizontal and vertical bolt plates oneon each o! the nanges, and means slidably mounting each bolt plate uponits flange for movement to extended and retracted positions inparallelism with the front panel, mitered ends on each bolt plateadapted to abut when the bolt plates are fully retracted, meansincluding links and link shifters on the door, for selective positiveextension and retraction of the door bolts from a location at one sideof the door panel, and inclines on the upper and lower horizontal boltplates, said inclines being formed on those outer edges of said plateswhich are nearest the hinge edge of the door and meeting the miteredends of said plates at a point such that the inclines will act as camsagainst a doorway, to automatically retract the vertical as well as thehorizontal bolt plates through the agency of the links and link shifterswhen the door is moved toward a closed position with the bolt platesextended.

2. Boltwork for a door having a front panel of rectangular formationhaving a hinge edge, and a rectangular jamb frame on one face of thepanel comprising flanges'parallel to the edges of the panel andprojected inwardly toward the middle point of the panel, said boltworkcomprising a series of elongated bolt plates one on each ofthe flanges,and means slidably mounting each bolt plate upon its ange for movementto extended and retracted positions in parallelism with the front panel,mitered ends on each -bolt plate adapted to abut when the bolt platesare fully retracted, means including links and link shifters on thedoor, for selective positive extension and retraction of the door boltsfrom a location at one side of the door panel, and yielding meansbetween one only of the bolt plates and its cooperative links, wherebysaid one bolt plate is rendered shiftable in the bolt retraetingdirection independently of the remaining bolt plates.

3. A sealing joint for a cabinet of the class described, which comprisesan outer shell having top, bottom, rear and side walls, and a forwardcontinuous door flange channel constituted of grooves formed in all butthe rear wall, an inner shell including walls corresponding to those ofthe outer shell, the inner shell being of reduced size to fit within theouter shell leaving spaces between the corresponding shell walls,insulating material in the spaces between said shell walls, and a doorjamb insert of open frame construction fitted to the top, bottom, andside walls of the inner shell, out of intimate full contact withthewalls of the inner shell so as to provide a heat conductivity breakbetween the exterior and the interior of the cabinet, means within theconnnes of the forward channel for anchoring the door j amb insert tothe outer shell walls, a door for the cabinet including a jambcomplementary .to the door jamb insert of the cabinet, elongatedshiftable bolts on the door for eiiect'ing a substantial seal interiorlyof the door jamb insert when the door is closed and bolted, and flangemeans on the door for entering the forward channel and concealing theanchoring means therein, thereby substantially sealing the door Ijambinsert exteriorly of the cabinet in the closed condition oi the door,and acting as adliuser preventing the formation of a localized explosivemixture oi gases at the jamb when the door is closed.

4. Boltwork for a door having a front panel of rectangular formationhaving a vertical hinge edge, a, vertical swinging edge, and opposedhori zontal upper and lower edges, with a rectangular jamb frame on oneface of the panel comprising anges parallel to the edges of the paneland projected inwardly toward the middle of the panel, said boltworkcomprising horizontal bolt plates shiftably mounted for lateralmovement@ upon the upper and lower anges of the jamb frame, and verticalbolt plates similarly mounted upon the vertical flanges of the jambframe for lateral shifting movement, a bolt plate actuator in the panel,and means including shifters and links having direct pivotal connectionswith all the bolt plates except the lower horizontal one, wherebypositive extension and retraction of said connected bolt plates areeffected by manipulation of the actuator, and means for controlling theone bolt plate which is free of the pivotal connections aforesaid, saidmeans comprising a plurality of links each having one end pivoted to ashifter and another end loosely coupled to the free bolt plate, andspring means acting upon each of the links last mentioned, to constantlyapply a compressive force to said last mentioned links and to yieldinglyurge the latter toward the retracted position, while yieldingly urgingsaid lower horizontal bolt plate to an extended position.

5. BoltWork for a door having a front panel of rectangular formationhaving a vertical hinge edge, a vertical swinging edge, and opposedhorizntal upper and lower edges, with a rectangular jamb frame on oneface of the panel comprising ilanges parallel to the edges of the paneland projected inwardly toward the middle of the panel, said boltcomprising horizontal bolt plates shiftably mounted for lateral movementupon the upper and lower anges of the jamb frame, and vertical boltplates similarly mounted upon the vertical flanges of the jamb frame forlateral shifting movement, a bolt plate actuator in the panel, and meansincluding Shifters and links having direct pivotal connections with allthe bolt plates except the lower horizontal one, whereby positiveextension and retraction of said ,connected bolt plates are effected bymanipulation of the actuator, and means for controlling the one boltplate which is free of pivotal connections aforesaid, said meanscomprising a plurality of links each having one end pivoted to a shifterand another end loosely coupled to the free bolt plate, spring meansacting upon each of the links last mentioned, to constantly apply acompressive force to said last mentioned links and to yieldingly urgethe latter toward the retracted position, while yieldingly urging saidone bolt plate to extended position, and an incline on the upper andlower edge of the upper and lower bolt plate, respectively, saidinclines being v located at those ends of the referred-to bolt plateswhich are nearest the hinge edge of the panel, and converged toward oneanother in the direction of said hinge edge.

6. A sealing joint for a cabinet of theclass decontinuous door -angechannel constituted of grooves formed in all but the rear wall, an innershellincluding walls corresponding to those of the outer shell, theinner shell being of reduced size to fit within the outer shell leavingspaces between the corresponding shell walls, insulating material in thespaces between said shell walls, and a door jamb insert of open frameconstruction secured at spacedintervals to the top, bottom,' and sidewalls of the inner shell, out of intimate full contact with the walls ofthe inner shell so as to provide a heatconductivity break between theexterior and the interior of the cabinet, means within the contines ofthe forward channel for anchoring the door jamb insert 'likewise atspaced intervals to the outer shell walls to provide for release ofgases generated within the insulation spaces, a door for the cabinetincluding a Jamb complementary to the door jamb insert of the cabinet,elongated shiftable bolts on the door for eiecting a substantial sealinteriorly of the door jamb insert when the door is closed and bolted,and iiange means on the door, for entering the forward channel andconcealing the anchoring means therein, thereby substantially sealingthe door jamb insert exteriorly of the cabinet in the closed conditionof the door, and actingeas a diuser preventing the formation of alocalized explosive mixture of gases at the jamb when the door isclosed.

7. Boltwork for a door, having a. front panelv of rectangular formationincluding a vertical hinge edge. a vertical swinging edge. and opposedhorizontal upper and lower edges, with a rectangular Jamb frame on oneface of the panel', supporting means for bolt plates disposed at, therear of the panel, horizontal bolt plates shiftably mounted for lateralmovement relative to the bolt plate supporting means, and vertical boltplates mounted upon the supporting means for lateral shifting movement,a bolt plate actuator in the panel, means including Shifters and linkshaving direct pivotal connections with all the bolt plates except thelower horizontal one, whereby positive extension and retraction of saidconnected bolt plates are effected by manipulation of the actuator, andmeans for controlling the one bolt plate which is free of the pivotal

